From 398e4cd2dc46a079071bf4fcd458c790b3796ad6 Mon Sep 17 00:00:00 2001
From: Shotaro Kohama <khmshtr28@gmail.com>
Date: Wed, 28 Jun 2023 21:57:41 -0700
Subject: [PATCH] Update `langchain.chains.create_extraction_chain_pydantic` to
 parse results successfully (#6887)

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- Description:
- The current code uses `PydanticSchema.schema()` and
`_get_extraction_function` at the same time. As a result, a response
from OpenAI has two nested `info`, and
`PydanticAttrOutputFunctionsParser` fails to parse it. This PR will use
the pydantic class given as an arg instead.
- Issue: no related issue yet
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---
 langchain/chains/openai_functions/extraction.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/langchain/chains/openai_functions/extraction.py b/langchain/chains/openai_functions/extraction.py
index e9286825e1a..ec4ab46a89d 100644
--- a/langchain/chains/openai_functions/extraction.py
+++ b/langchain/chains/openai_functions/extraction.py
@@ -78,9 +78,9 @@ def create_extraction_chain_pydantic(
     class PydanticSchema(BaseModel):
         info: List[pydantic_schema]  # type: ignore
 
-    openai_schema = PydanticSchema.schema()
+    openai_schema = pydantic_schema.schema()
     openai_schema = _resolve_schema_references(
-        openai_schema, openai_schema["definitions"]
+        openai_schema, openai_schema.get("definitions", {})
     )
 
     function = _get_extraction_function(openai_schema)